Answer: you can always turn off global logging by setting global_logging to N. However, if you want to shave every millisecond from your stored procedure's execution time, comment out all CALL DB2.

解答：可以通过将global_logging设置成n来全局地关闭日志功能。然而，如果希望节省存储过程执行时的每一毫秒的时间，那么在确信SQL - PL和外部存储过程都已经准备好之后，就可以注释掉所有的CALL DB2。

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